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Provides the fundamental data collection unit of the TraffoMeter system. A TraffoPacket
represents a pair of &lt;location, timestamp&gt; data values in addition to a vehicle type. The
classes in this package provide the TraffoPacket ADT. The following list provides a short
description of how this package's classes are organized:
<ul>
<li>TraffoPacket - the primary representation of the packet. The actual data in this packet is
stored in two LocationTimestampPair objects and one VehicleType. A client (most likely traffoSim)
can create TraffoPackets to send off to the server.</li>
<li>LocationTimestampPair - represents where a vehicle is on earth at a given point in time. 
This data value is meaningless unless we are able to associate a single LocationTimestampPair
with another. For this reason, TraffoPacket contains two LocationTimestampPair objects. This 
object contains a Location and a Date object.</li>
<li>Location - represents a specific location on earth using GPS coordinates. Again, this 
data point is meaningless without the other necessary information surrounding it. </li>
<li>Test Classes - The test classes provide unit tests for the basic functionality that the 
TraffoPacket provides.</li>
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